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  One-Shot Measurement of Effectiveness Factors of Chemical Conversion in Porous Catalysts

Chmelik, C., Liebau, M., Al-Naji, M., Möllmer, J., Enke, D., Gläser, R., et al. (2018). One-Shot Measurement of Effectiveness Factors of Chemical Conversion in Porous Catalysts. ChemCatChem, 10(24), 5602-5609. doi:10.1002/cctc.201801530.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-956E-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-02FC-C
Genre: Journal Article

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 Creators:
Chmelik, Christian, Author
Liebau, Michael, Author
Al-Naji, Majd1, Author              
Möllmer, Jens, Author
Enke, Dirk, Author
Gläser, Roger, Author
Kärger, Jörg, Author
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1Majd Al-Naji, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3050472              

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Free keywords: Effectiveness factor, glasses, Heterogeneous catalysis, Reaction Kinetics, reaction mechanisms
 Abstract: From the earliest days of heterogeneous catalysis, high surface area solids were extensively used for attaining largest possible densities of active sites and, correspondingly, for maximizing turnover. Since sites are active in the real sense of the word only if they are occupied by reactants, i.e., by molecules still to be converted, the relative fraction of pore volume occupied by reactants (the ?effectiveness factor?) is a key number for the efficiency of a catalyst in a given reaction. Its determination, so far generally based on reaction rate measurements with purposefully varied catalyst particles, remained to date a challenging task since it must be based on additional assumptions. The ?one-shot determination? of effectiveness factors by IR microimaging, here exemplified on considering the catalytic hydrogenation of benzene to cyclohexane by platinum dispersed on nanoporous glass, is shown to open up a promising route to overcome these limitations.

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 Dates: 2018-11-192018
 Publication Status: Published in print
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Title: ChemCatChem
  Other : ChemCatChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 10 (24) Sequence Number: - Start / End Page: 5602 - 5609 Identifier: ISSN: 1867-3880